The area (in sq. units) of the region enclosed by the curves y = x2 – 1 and y = 1

Question

The area (in sq. units) of the region enclosed
by the curves y = x² – 1 and y = 1 – x² is equal to :

${8 \over 3}$

${4 \over 3}$

${7 \over 2}$

${{16} \over 3}$

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